HEIC to CR2 Converter

About HEIC

HEIC (High-Efficiency Image Container) is the default photo format on every iPhone and iPad since iOS 11, released in 2017. Apple adopted it to replace JPEG after nearly four decades — not for aesthetic reasons, but for pure efficiency. A 12-megapixel photo that takes 3.5 MB as a JPEG typically occupies just 1.5–2 MB as HEIC, with no visible difference in quality.

The compression comes from HEVC (H.265), the same video codec that makes 4K streaming practical on mobile connections. HEVC analyzes the image in chunks and encodes spatial patterns more efficiently than JPEG's block-based DCT algorithm. The result is 10-bit color depth — compared to JPEG's 8-bit — which means smoother gradients and more accurate shadow and highlight detail, particularly in portrait and landscape photography.

HEIC also functions as a container, not just a codec. A single .heic file can hold a burst sequence, a Live Photo (the still frame plus the short video clip), or a portrait-mode photo with its depth map intact — all in one file. JPEG cannot do any of this.

The compatibility problem

HEIC's efficiency comes at a cost: it requires hardware support and licensed software to decode. Windows does not open HEIC files natively. Most Android devices cannot display them. Chrome, Firefox, and Edge do not render HEIC in the browser. The majority of websites, online forms, and file-upload services expect JPEG or PNG. Print labs, stock photo sites, Google Drive's web viewer, Facebook, Instagram, and Microsoft Office all work with JPEG — not HEIC.

If you've ever emailed an iPhone photo to a Windows user and had them tell you it won't open, or tried to upload a photo and gotten a "file type not supported" error, HEIC is why.

What happens during HEIC to JPG conversion

Converting HEIC to JPEG is a decode-then-re-encode process. The HEVC-compressed data is decoded to a raw pixel grid, then re-encoded using JPEG's algorithm. Both formats are lossy, so this is technically a second lossy compression step. In practice, at quality settings of 82% or higher, the difference is imperceptible — even at full zoom on a high-resolution monitor. If you need to compare, open the original HEIC on an iPhone or Mac and the converted JPEG side-by-side; at typical sharing sizes, they are visually identical.

EXIF metadata — including the date, camera settings, and GPS coordinates — is preserved in the conversion unless you explicitly strip it. The primary still frame is extracted and converted. Live Photo motion clips, depth maps, and HDR metadata are not carried into the JPEG; JPEG has no container for them.

File size after conversion

A 2 MB HEIC photo typically becomes a 3–5 MB JPEG at 85% quality. This isn't a flaw in the converter — it's the fundamental difference in codec efficiency. HEIC is the more compact format. Converting to JPEG expands the file because JPEG needs more bytes to represent the same visual data. If final file size matters, consider converting to AVIF instead: AVIF is an open-standard successor to HEIC with comparable compression and broad browser support in 2024 and beyond.

The GPS and privacy consideration

iPhones embed precise GPS coordinates in every photo's EXIF data by default. When you convert HEIC to JPEG, that location data transfers to the new file. If you're uploading converted photos to a public website, a social media profile, or a forum, anyone who downloads the image and reads its EXIF data can see exactly where it was taken — your home, your workplace, your children's school.

Before sharing converted photos publicly, strip the EXIF location data. After conversion, run the JPEG through at-use.com's EXIF metadata remover to clear GPS tags before uploading anywhere public.

When to keep HEIC

If you live entirely within Apple's ecosystem — shooting on iPhone, editing on Mac, storing in iCloud Photos, viewing on Apple TV — HEIC is the right choice. Apple's apps handle it natively, you preserve more visual data in less storage, and Live Photos stay intact. Convert when you need to cross the boundary: sharing with Windows or Android users, uploading to a website, submitting to a print lab, using in a presentation, or archiving in a format that will open on any device in ten years.

About CR2

CR2 (Canon Raw version 2) is the proprietary RAW file format used by Canon EOS DSLR cameras from approximately 2004 through 2018 — models including the 5D, 5D Mark II, 5D Mark III, 7D, 7D Mark II, 70D, 80D, and the Rebel series (1100D through 800D). Like all RAW formats, CR2 stores the unprocessed sensor data captured at the moment of shooting: 14-bit color depth per channel, full dynamic range before any white balance or tone curve is applied. Photographers shoot in CR2 precisely for this latitude — a file that appears underexposed or color-shifted can be recovered in post-processing without visible quality loss that would occur if the correction were applied to an in-camera JPG.

The tradeoff is compatibility. CR2 files require Canon's Digital Photo Professional, Adobe Lightroom, Adobe Camera Raw, or another RAW-capable editor to open. They are not displayable in browsers, email clients, social platforms, or most general-purpose applications. Converting to JPG produces a universally compatible file that opens in every application without additional software or codec downloads.

When CR2 to JPG makes sense

Any delivery or sharing scenario that prioritises compatibility over editability calls for JPG. Sending shots to a client by email, uploading to a social platform, publishing to a photography blog, or submitting to a print lab that accepts JPEG — all require a processed output. This converter provides a direct path from CR2 sensor data to a ready-to-share JPG or PNG without opening a desktop application.

About this conversion

Conversion uses ufraw-batch to decode the CR2 sensor data, then Imagick to produce the output JPG, PNG, or WebP. The decode applies default auto white balance and a linear tone curve — a neutral, flat render without Canon's Picture Style profiles (Standard, Portrait, Landscape, etc.) or in-camera sharpening. The output is technically correct but intentionally neutral. It is a starting point, not a finished edit. For output that replicates the camera's own JPEG output style exactly, export from Canon Digital Photo Professional or Adobe Lightroom with your chosen Picture Style applied.

File size note

CR2 files from Canon DSLRs range from 10–30 MB depending on camera model and megapixel count. This converter has a 20 MB upload limit. Files from high-resolution bodies — particularly the 5DS (50 MP) and 5DS R (50 MP) — frequently exceed 30 MB uncompressed. In that case, reduce resolution in-camera, enable in-camera RAW compression if available, or export a high-quality JPEG from your RAW editor and use this converter for format-only conversion.